In which of the following activities silicon carbide is used?

In which of the following activities silicon carbide is used?

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1) Actinides are the elements with atomic numbers from

2) Which among the following is a positively charged particle emitted by a radioactive element?

3) Balloons are filled with

4) Very small time intervals are accurately measure by

5) Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?